PSY397 MAY 13.docx

PSY397 MAY 13, 2013
Slide 1
- Pseudo satellite images cloud cover away
- East coast
- Sunrise on eastcoasr on na
- Shape of arc indicate the year
- Horizontal nature of top sub light to lef not illuminate north so winter time
- Shadow bw light and dark and that is twilight and move from east to west
- And know day based on twilight sits
- Know time of year horizontal and time form perp
2
- Nfl 730 in morning
- Then w hour later
- Sunrise later and later
- All of na illuniated in eastern time zone
Cbtc
- Schools 9 in morning and acroos Canada
- According to sun time school and work force start day 1 145 after sun has risen
- Thunderbay just as the sun rises go to school
- And same in nun go to school in dark
- Not full estbaloshed sun till 1030 in nun
- All exposed to different light dark cycles
- Bio clock synch to cycles asked to go to at different times according internal clocks
- Go school 130 hr before their body tells them to wake up
- Better part of last half century
How do we deal with time
- All organisms not juts humans
- Deal with time and why deal with mechanism that can measure duration of time time since
- More specifically for org that pred how long food run down burrow how long to come back up
- For remembering time as well
- Something sig in env occurred register what happened when and where –
- Perception of time passing diff form measurement a lot to do with attention
- Clocks devices mimick regular cycles of outside world and anticapte reg changes
Natural selection
- One way look at it - Asking question why have these things why have clocks
- Know why know more about structure how did nature come up with odd thing
- Does it make sense to us and can we control it
- Nature no purpose trial and error and org optimize activity in difernt environment by dif
reproduction
- Env changes everyday and every year etc
- Env is changing gnotonly adaqpted to snapshot also to env that change over time and change
reg
- Not just tekking the time allowing adaptation to be optimized
An ancient need for clock
- Prupose
- Fundamental need for orgto have clock
- Strucuture of clock of different org adapted four time
- Molecule clock find large kingdoms of life all have diff mol clocks
- Within the family same clock
- Fundamental reason to get out of the light
- Bacteria exist in light use sun as source of energy
- Light is extrememly deleterious to exist particular uv light get rid of org light from sun and light
exist long back before atmosphere was oxygenated
- When clocks first aross
- Sequestrial mole two times of day
- Growth at night and cytoplasmic operation day when org can gather light energy
- Why org benefit having clock when sit there
- No obvious answer
- Mimic cycles outside world so well hard to argue there are clocks
How much energy
- Why not just reacting to outside world
- Determine need for clock
- Need for clock vs risk
- Risk and some need to expend energy to get more
- Risk ass with self